Three-dimensional finite element analysis of intramedullary nail with different materials in the treatment of intertrochanteric fractures |
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| Affiliation: | 1. College of Biomedical Engineering, Taiyuan University of Technology, No.79, Yingze West Road, Taiyuan, Shanxi, 030024, China;2. School of Engineering and Informatics, University of Sussex, Brighton BN1 9QJ, UK;1. Graduate Program in Surgery and Translational Medicine, Medical School, São Paulo State University (Unesp), Botucatu, São Paulo, Brazil;2. Department of Structural and Functional Biology (Anatomy Sector), Institute of Biosciences, São Paulo State University (Unesp), Botucatu, São Paulo, Brazil;3. Center for the Studies of Venoms and Venomous Animals (CEVAP), São Paulo State University (Unesp), Botucatu, São Paulo, Brazil;4. Herminio Ometto University Center (Uniararas), Araras, São Paulo, Brazil;1. Department of Surgery, University of Massachusetts Medical School, 55 Lake Ave N, Worcester, MA01655, United States;2. University of Massachusetts Medical School, 55 Lake Ave N, Worcester, MA01655, United States;3. Department of Surgery, Division of Pediatric Surgery, University of Massachusetts Medical School, 55 Lake Ave N, Worcester, MA01655, United States;1. IDMEC, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal, Av. Rovisco Pais, 1 1049-001;2. FEBOT, NOVA Medical School, Lisbon NOVA University, Lisboa, Portugal, Campo dos Mártires da Pátria 130, 1169-056;1. State Key Laboratory for Manufacturing System Engineering, School of Mechanical Engineering, Xi’an Jiaotong University, (710054), Xi’an, ShaanXi, China;2. The First Affiliated Hospital of Baotou Medical College, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia (014010), China;1. Department of Orthopaedics, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, PR China;2. Department of Otolaryngology Head and Neck Surgery, Peking University Third Hospital, Beijing, 100191, PR China;3. Department of Emergency, Chinese PLA General Hospital, No. 28 Fuxing Road, Beijing 100853, PR China;4. Department of Orthopaedics, The Third People''s Hospital of Qingdao, No. 29 Yongping Road, Qingdao 266041, PR China |
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| Abstract: | Intramedullary nails are the common treatment options for femoral intertrochanteric fractures. However, aseptic loosening is considered to be one of the primary forms of failure that can be caused by the stress shielding between the bone and implants. The matching in mechanical properties of implant and bone is a key issue to prevent this failure. Polyetheretherketone (PEEK) and Function-graded (FG) materials are widely used in clinical because of their excellent mechanical properties. In this study, to investigate the biomechanical behaviors of intramedullary nails made of Ti-6Al-4V alloy, Stainless Steel (SS), PEEK and two FG materials, three-dimensional finite element models of intertrochanteric fracture femur with intramedullary nail were constructed with ABAQUS. The maximum von Mises stress on the femoral fracture surface fixed by PEEK intramedullary nail was the largest, followed by FG intramedullary nail, which help stimulate bone growth and subsequently reduce fracture healing time. Compared with traditional metal intramedullary nails, PEEK and FG implants might increase von Mises stress along the same path in the proximal femur. The results showed that PEEK and FG intramedullary nails obviously changed the stress distributions in the bone and reduced stress shielding. This finding indicated that PEEK and FG intramedullary nails have the potential to become alternatives to the conventional metal intramedullary nails. |
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